Home / 3,949.79-5,450.70-2,181.38

Finding the Fourth Proportional to 3,949.79, 5,450.70 and 2,181.38

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Solution

The fourth proportional to 3,949.79, 5,450.70 and 2,181.38 is: 3,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.79 : 5,450.70 = 2,181.38 : x
  2. Step 2: Convert to fraction form
    3,949.79/5,450.70 = 2,181.38/x
  3. Step 3: Cross multiply
    3,949.79x = 5,450.70 × 2,181.38
  4. Step 4: Simplify right side
    3,949.79x = 11,890,037.06
  5. Step 5: Solve for x
    x = 11,890,037.06/3,949.79
  6. Step 6: Final answer
    x = 3,010.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.